I have recently read two Pride and Prejudice "continuations"
Charlotte by Helen Moffett which I thought was so-so. A bit too modern in its sensibilities, and rather glum.
Expectations by Frances Murray which I absolutely loved. Engaging and dryly humorous. Passes my test of "I'd better hang on to this one to re-read" although it was a Kindle Unimited freebie.
I think her books are mostly out of print but I am seeking them out online.
Anyone else?